Jamb Mathematics 1989 Past Questions and Answers

Question 36:

• JAMB 1989

a cylindrical metal pipe 1m long has an outer diameter of 7.2cm and an inner diameter of 2.8cm. Find the volume of metal used for the cylinder

A. 440\(\pi\)cm³
B. 1100\(\pi\)cm³
C. 4400\(\pi\)cm³
D. 1100\(\pi\)cm³

Question 37:

• JAMB 1989

OXYZW is a pyramid with a square base such that OX = OY= OZ = OW = 5cm and XY = XW = YZ = WZ = 6cm. Find the height OT

A. 2\(\sqrt{5}\)
B. 3
C. 4
D. 4\(\sqrt{3}\)

Question 38:

• JAMB 1989

In preparing rice cutlets, a cook used 75g of rice, 40g of margarine, 105g of meat and 20g of bread crumbs. Find the angle of the sector which represents meat in pie chart

A. 30^o
B. 60^o
C. 112.5^o
D. 157.5^o

Question 39:

• JAMB 1989

In a family of 21 people, the average age is 14years. If the age of the grandfather is not counted, the average age drops to 12 years. What is the age of the grandfather?

A. 35 years
B. 40 years
C. 42 years
D. 54 years

Question 40:

• JAMB 1989

If n is the median and m is the mode of the following set of numbers, 2.4, 2.1, 1.6, 2.6, 2.6, 3.7, 2.1, 2.6, then (n, m) is

A. (2.6, 2.6)
B. (2.5, 2.6)
C. (2.6, 2.5)
D. (2.5, 2.1)